vacuum cleaner; vacuum; hoover
The ordinary word for a household vacuum cleaner. The common expression 掃除機をかける means to vacuum a room, floor, carpet, and so on.
I vacuumed my room over the weekend.
This vacuum cleaner is light and easy to use.
cleaning device; cleaning apparatus
Only when written 掃除器
Broader use restricted to the spelling 掃除器, referring to a device used for cleaning rather than specifically a household vacuum cleaner.
At the factory, they use a special cleaning device to wash the inside of narrow pipes.
I vacuumed every corner of the room with the vacuum cleaner.
The old vacuum cleaner suddenly broke down.
This vacuum cleaner has strong suction, so it picks up even fine dust well.
robotic vacuum cleaner; robovac